Discarding items is the most important step in tidying, and must always come first. The rule is for the owner to pick up each individual item and ask whether it excites them or brings any joy to their life. If so, it should be kept for reorganization and storage. If not, it should be discarded. While discarding, people should follow a certain order, with hard-to-part-with items such as mementos and tokens of sentimental value sorted last. This is to avoid becoming derailed in the discarding process.